This will work but efficiency is low for inductive power coupler unless you
can sense a docked condition and then the coils need to be in close proximity.

At 07:51 AM 6/24/98 +0000, Dan Larson wrote:
>You could also over-engineer things and try something like
>inductive power coupling!  Have an inductive coil on the
>inside of the box.  The charging device on the outside would
>also have an inductive coil.  An AC current through the
>charging coil would be coupled to the pickup coil, where it
>would then be rectified and used to charge the device's
>betteries.
>
>On Tue, 23 Jun 1998 20:56:45 -0400, Sean Breheny wrote:
>
>>On Tue, 23 Jun 1998, Lewis H. Cobb wrote:
>>
>>> Not exactly a PIC topic but it's being used for a gadget that has a pic in
>>> it - :)
>>Hi Lewis,
>>
>>Hey, I'm probably one of the worst offenders in this regard :)
>>
>>>
>>> I am looking for a small DC power jack - panel mounted - like a 2.1 or
>>> 2.5mm "barrel" type that are used in many rechargable devices, that is
>>> somewhat "weather resistant".  The existing ones that I have seen are
>>> nowhere near usable outdoors as they have openings inside that let
moisture
>>> and water in quite freely.  I'd like to make a pic device I am working on,
>>> rechargable and this would be a simple way to provide a connection if it
>>> were moisture resistant.  BTW - the enclosure is metal - hence I can't
>>> easily use metal "tabs" that are seen on cell phones - besides - this
would
>>> a 4 zillion dollar industrial design/injection molding process anyway :).
>>>
>>
>>I think that you are looking for the wrong type of jack. I don't think
>>that there are anytype of coaxial power jacks that are really
>>"weatherproof". They are inherently exposed to the weather due to the
>>fact that they are not locking connectors so the hole in the front is not
>>sealed when the connection is made. I have seen some types of Molex
>>connectors with plastic "boots" on them to protect them from the elements.
>>You might look into those.
>>
>>I am curious as to why your device needs to be easily disconnectable if
>>it is designed to operate outdoors? If you don't care about being
>>non-standard, you might consider using connectors designed for outdoor
>>120VAC or even coaxial RF connectors. These are likely to be much more
>>common and cheaper.
>>
>>> Thanks for any help people can provide.
>>>
>>> Regards,
>>> Lewis
>>>
>>
>>Good luck,
>>Sean
>>
>
>
Larry G. Nelson Sr.
mailto:L.Nelson@ieee.org
http://www.ultranet.com/~nr